crawfish vs yabby

crawfish

noun
  • Various freshwater crustaceans, crayfish. 

  • Various marine crustaceans, rock lobster; especially Jasus lalandii, the Cape crawfish. 

  • A slur against Anglo-Canadians used in some corners of Quebec (including the Gaspé). 

verb
  • To backpedal, desert or withdraw (also used with out). 

yabby

noun
  • An Australian freshwater crayfish of the genus Cherax, especially Cherax destructor. 

  • A species of marine ghost shrimp, Trypaea australiensis, widely harvested by recreational anglers as bait. 

verb
  • To show disrespect by denouncing or insulting; to diss. 

  • To search, forage, or fish for yabbies. 

How often have the words crawfish and yabby occurred in a corpus of books? (source: Google Ngram Viewer )